The growth trend of publications in the field of Proton Exchange Membrane Fuel Cell (PEMFC) was analyzed using bibliometric techniques to the identification of the areas with significant development and the orientations that have guided the research on energy cells. This study extracted the data from Scopus and Web of Science (WoS) databases to compare the bibliometric indicators of the published productions. In spite of bibliometric analysis advantages to knowing about the trends in a study area, this research requires methods to support the investigation process through the selection of a relevant bibliographic portfolio. This study applied the Methodi Ordinatio that provides a new approach to achieve it. A proposed list of the articles ranked by InOrdinatio is presented to compose the final portfolio. The obtained results in the research sub-theme of the Mass Transport in Gas Diffusion Layer (GDL) confirm the complexity in the study area by presenting erratic patterns of exponential growth. United States, China, and Japan are the leading countries on PEMFC publications. These countries have in common a strong spending by the business sector for R&D, and their gross domestic product is greater than 2%.

Inorganic phase change materials (PCMs) can be employed in passive thermal regulation systems as building envelopes to decrease energy consumption. Nonetheless, they present a manifold of issues, such as leakage, incongruent melting, crystallization, and supercooling, which limit their performance and durability. A widely explored approach to address these shortcomings is the development of eutectic salts and their stabilization through techniques such as the use of porous substrates and encapsulation, in addition to combining them with the incorporation of carbon derivatives as fillers and nucleating agents to enhance thermal performance and durability during charge and discharge cycles. In this study, a critical review is developed via analysis and discussions of different methods for incorporating inorganic PCMs. The focus is mainly on eutectic salts and the challenges associated with their application, the generation of new eutectic salts, stabilization methods, and use cases where the incorporation of fillers, the use of porous substrates, and the implementation of nucleating agents have contributed to improving thermal performance, reducing the degree of supercooling, and minimizing PCM leakage during phase transitions.

Computational Fluid Dynamics (CFD) software is well known for its application feasibility as well as reliable results in modeling electrochemical, thermal, and fluid transport processes. CFD has been used to investigate the phenomena involved in the operation of fuel cells, providing a large amount of data that must be analyzed to improve cell efficiency. This paper aims to demonstrate that programming can be used in the post-processing phase, using scripts in Python language to automate data analysis, based on the results of the simulation of oxygen transport in Polymer Electrolyte Membrane Fuel Cell (PEMFC). The OpenFOAM open-source CFD tool solved the fluid governing equations through the SIMPLE algorithm of three proposed Gas Diffusion Layer (GDL) case studies. In this work, an algorithm is presented to extract, compute and visualize the post-process results, supporting the GDL selection.

This study proposes a theoretical–methodological model for communities engaged in alternative tourism, based on the Sustainable Development Goals (SDGs) and in alternative development structures—understood as organizational forms that differ from the dominant economic model by prioritizing communal and sustainable principles. Through a theoretical, exploratory–descriptive, and qualitative approach, the research adapts an analytical model previously applied to conventional tourism areas and redirects it toward rural territories with tourism potential. The resulting model, named METACORTAL, offers a structured methodology aimed at strengthening community processes and guiding the implementation of sustainable tourism practices. A total of 15 goals, 36 targets, and 49 indicators from the 2030 Agenda are identified as aligned with alternative tourism and with at least one form of alternative development structure. This study is highly relevant for policymakers, community leaders, and tourism stakeholders seeking to link local development with global sustainability frameworks. By offering a practical decision-making tool, it contributes to advancing the SDGs through inclusive and context-sensitive tourism models.

Electrochemical CO ₂ compression (ECO ₂ C) is emerging as a transformative technology for CO ₂ management, offering an electrically driven approach for the concentration and pressurization of CO ₂ through electrochemical transport processes. Unlike conventional mechanical methods, ECO ₂ C operates under moderate temperatures and pressures, with lower energy losses and no moving parts, positioning it as a sustainable alternative. This review provides a comprehensive analysis of the state of the art in electrochemical CO ₂ technologies, supported by a rigorous bibliometric study that identifies emerging trends, key authors, and leading institutions. Based on this framework, the work explores the operational principles of ECO ₂ C, the thermodynamic mechanisms involved, and the role of critical materials such as electrocatalysts, anion exchange membranes, and gas diffusion layers. Furthermore, it addresses the key challenges associated with faradaic efficiency, high overpotentials, and the competing hydrogen evolution reaction. Finally, the study identifies parameters for industrial scalability and provides guidelines for device design.

The Gas Diffusion Layer (GDL) provides a transport route for the reactant species from the flow channels to the catalytic layer in a fuel cell. The components design requires that the species present a uniform diffusion towards the electrodes and that the formed products are shifted as faster as possible, to avoid the increase of the ohmic resistance due to the blocking of the active sites, or it constitutes a bottleneck that the performance decrease fast. This work presents a solution proposal for the continuity equation in incomprenssible fluids in a 3D model of a gas diffuser layer with titanium wired mesh characteristics of a fuel cell using "OpenFOAM" open source software. The aim of the study is to show that under different scales or size of the gas diffusion layer there are significant changes in the velocities of propagation of the reactant species towards the active area of the fuel cell.